Erikson's Stages Of Development

Sigmund Freud believed in four stages of Psychosocial Development. He believed that humans in general are constantly searching for what gives them pleasure, from a lack of hunger to sexual fulfillment. In general, I believe Freud's theory is correct, but it's weakness is that it's basic. Yes, obviously humans are constantly searching for satisfaction, that's why we're still existing after thousands of years. Why we somehow made it out of the caveman days. Because were searching for survival. But Freud's theory does not give a 'why?' It does not describe why humans have feelings of satisfaction or being unsatisfied beyond the knowledge of feeling hunger, for example. Erik Erikson's Theory of Psychosocial Development is such more detailed. He gives specific ages to each stage within hi progression.
However, I believe it's weakness is the same as it's strength; the rigidness of such a plan may not work for everyone. A child may not have the best upbringing, he may not have had a father and maybe his mother was a druggie. According to Erickson's theory this would result in mistrust of others. And yes, this may be true. However it is not true for everybody and his theory does not allow for deviation.This is the true weakness in Eric Erikson's theory. Jean Piaget had a theory that children are just immature adults. I think Piaget's theory is strong because it just gives general guidelines; make believe, cognitive recognition, etc. I think it's weakness is not accounting for the stragglers who do not comply to his plan. But this weakness seems to be a common problem among every developmental theory in this